Xbox Live update: 'Quantum Conundrum'

Explore a trap-filled mansion using a dimension-shifting glove to solve devious puzzles and rescue Professor Quadwrangle in a game by Portal co-creator Kim Swift. Quantum Conundrum can be downloaded for 1200 MS Points (£10.80 / $15).

Full retail releases Portal 2 and Zumba Fitness: Rush are also now available for download, along with new character skin DLC for Minecraft.

Finally, there are major sales on Xbox Live. Bethesda is offering discounts on DLC for Elder Scrolls IV: Oblivion and Fallout 3 for the Deal of the Week, and Microsoft is running its own sale on Xbox Live Arcade titles including Toy Soldiers: Cold War, Hydrophobia, Section 8: Prejudice, The Splatters and Hydro Thunder Hurricane.